#define _CRT_SECURE_NO_WARNINGS 1
#pragma warning(disable:6031)
#include <iostream>
using namespace std;

class Base {

private:
    int x;
    int y;

public:
    Base(int x, int y) {
        this->x = x;
        this->y = y;
    }

    int getX() {
        return x;
    }

    int getY() {
        return y;
    }

    void calculate() {
        cout << getX() * getY() << endl;
    }

};

class Sub : public Base
{
public:
    Sub(int x, int y)
        :Base(x, y)
    {

    }
    void calculate()
    {
        if (getY() == 0)
            cout << "Error" << endl;
        else
            cout << getX() / getY() << endl;
    }

};

int main() {

    int x, y, z;
    cin >> x;
    cin >> y;
    Sub sub(x, y);
    sub.calculate();

    return 0;
}